On its inaugural expedition, Falkor (too) will head to the Mid-Atlantic Ridge with Chief Scientist Dr. David Butterfield from the NOAA Pacific Marine Environmental Laboratory – University of Washington, and his team to search for hydrothermal lost cities. In 2000, scientists found a hydrothermal vent system on the Atlantis Massif unlike any seen before. Ghostly towers made of limestone sprang from the seafloor, spewing clear liquid, and very few creatures dwelled among the vents. When the scientists sampled the chemistry, they found it vastly different from black smoker vents on the nearby Mid-Atlantic Ridge volcanoes. The scientists named the new, alkaline vent system, “Lost City.” They determined the reaction creating this new type of vent occurs on a geologic formation known as an oceanic core complex, where mantle rock is exposed to cold seawater. These carbonate vents form when the seawater and mantle rock react in a process known as serpentinization.

Since 2000, scientists have discovered only a few other vents like Lost City, and none that rival the size of the original. During this expedition, Butterfield and his team will search for more vent fields like Lost  City— alkaline vents created by serpentinization.

More about the research HERE.

ROV 491 – Vent Communities of Puy des Folles Seamount
Date: March 3, 2023
Location: Puy des Folles Seamount at the Mid-Atlantic Ridge
Estimated Maximum Depth: 2000 meters
Work Completed: First ROV SuBastian Divestream aboard R/V Falkor (too), exploring the hydrothermal communities at Puy des Folles Seamount at the Mid-Atlantic Ridge.

ROV 492 – Scaling the Scarps of the Kane Fracture Zone
Date: March 14, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 2000 meters
Work Completed: Exploring the geology of the oceanic core complex features at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge.

ROV 493 – Diving to a Detachment Fault
Date: March 15, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 2050 meters
Work Completed: Exploring the geology of the oceanic core complex features at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge.

ROV 494 – Hunting for Hydrothermal Flow
Date: March 17, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 2230 meters
Work Completed: Today’s dive has a few objectives: collect peridotite and other geological samples while transecting a 1000m scarp, observe the fauna, and then we will be heading to the curved ridges of the detachment fault. As always, we are on the hunt for any evidence of current or past hydrothermal vent flow. Our AUV missions from earlier today have provided incredibly high-resolution maps that we used to inform where we are diving today.

ROV 495 – Discovering More Vents at EMARK (pt. 1)
Date: March 22, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3930 meters
Work Completed: Continuing to explore the geology of the oceanic core complex features at the detachment fault at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge. Today’s maximum depth is 3930m and we are investigating a chimney identified from preliminary AUV data as well as chemical investigation from the CTD casts.

ROV 495 – Discovering More Vents at EMARK (pt. 2)
Date: March 22, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3930 meters
Work Completed: Continuing to explore the geology of the oceanic core complex features at the detachment fault at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge. Today’s maximum depth is 3930m and we are investigating a chimney identified from preliminary AUV data as well as chemical investigation from the CTD casts.

ROV 495 – Discovering More Vents at EMARK (pt. 3)
Date: March 22, 2023
Location: Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3930 meters
Work Completed: Continuing to explore the geology of the oceanic core complex features at the detachment fault at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge. Today’s maximum depth is 3930m and we are investigating a chimney identified from preliminary AUV data as well as chemical investigation from the CTD casts.

ROV 496 – Vents Encore
Date: March 24, 2023
Location: SE Massif at the Kane Fracture Zone at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3950 meters
Work Completed: Continuing to explore the geology of the oceanic core complex features at the SE Massif at the Kane Fracture Zone (23 degrees N) at the Mid-Atlantic Ridge.

ROV 497 – Exploring Grappe Deux at the Mid-Atlantic Ridge
Date: March 27, 2023
Location: Grappe Deux at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3665 meters
Work Completed:  This is the first ROV SuBastian dive at a site called Grappe Deux (25 degrees N) at the Mid-Atlantic Ridge. There are several objectives for this dive – explore for hydrothermal activity at mound structures identified by the AUV survey, complete geological and biological sampling at location, and survey a scarp with previously-characterized peroditite geology by IFREMER.

ROV 498 – Splashing to a “Swarm Smoker” at Grappe Deux, Mid-Atlantic Ridge
Date: March 29, 2023
Location: Grappe Deux at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3665 meters
Work Completed: There are several objectives for this dive including exploring for hydrothermal activity at “swarm” smoker identified by the previous ROV dive. This will primarily be a sampling dive.

ROV 499 – Continuing Geological Sampling at Grappe Deux
Date: March 30, 2023
Location: Grappe Deux at the Mid-Atlantic Ridge
Estimated Maximum Depth: 3400 meters
Work Completed: There are several objectives for this dive – explore for hydrothermal activity at mound structures identified by the AUV survey, complete geological and biological sampling at location. The general goal is to understand the stratigraphy of exposed units at Grappe Deux in the vicinity of the large landslide scarp and peridotite samples collected by IFREMER.

ROV 500 – ROV SuBastian’s 500th Dive at Puy Des Folles Volcano
Date: April 2, 2023
Location: Puy Des Folles Seamount at the Mid-Atlantic Ridge
Estimated Maximum Depth: 1900 meters
Work Completed: Returning to explore and sample the high-temperature hydrothermal vent communities at Puy Des Folles Seamount at the Mid-Atlantic Ridge. We are excited to celebrate ROV SuBastian’s 500th dive!!!

ROV 501 – ROV SuBastian’s Samples More Hydrothermal Vents at Puy Des Folles
Date: April 3, 2023
Location: Puy Des Folles Seamount at the Mid-Atlantic Ridge
Estimated Maximum Depth: 1900 meters
Work Completed: Returning to explore and sample the high-temperature hydrothermal vent communities at Puy Des Folles Seamount at the Mid-Atlantic Ridge. We are planning to complete chemical and biological sampling at several vent sites and, as always, we are always hoping to look for more thanks to our updated AUV surveys.

ROV 502 – Jarad Easterwood Tower
Date: April 4, 2023
Location: Puy Des Folles Seamount at the Mid-Atlantic Ridge
Estimated Maximum Depth: 1900 meters
Work Completed: This is a special dive in memory of Jarad Easterwood, our beloved ROV pilot who passed suddenly last weekend.